Glazing bar



A ril 19, 1938. I J. WILLIAMS GLAZING BAR Filed Dec. 28, 1936 PatentedApr. 19, 1938 NITED STATES GLAZING BAR Jack Williams, London, EnglandApplication December 2a, 1936, Serial No. 1111.917 In Great BritainJanuary 3, 1936 5 Claims. (Cl.108-16) This invention relates to glazingbars of the kind comprising a main part or web having a pair of spacedabutments which extend longitudinally and are formed integrally with it,the

5 edge of the glass being held between one of these abutments and aclamping bar which cooperates with the other abutment. The object of thepresent invention is to provide an improved glazing bar which will besimple and inexpensive to produce and effective in operation.

To this end a glazing bar according to the present invention comprises aweb having a pair of spaced abutments which extend longitudinally andare formed integrally with it, and between which the edge of a sheet ofglass lies so as'to rest on one of them, and between the glass and theother abutment a resilient clamping bar of which the cross-section isgenerally L-shaped and has one limb sloping from the said abutment awayfrom the web to the surface of the glass and the ,other limb extendinginwards towards the web being so shaped that its end projects beyond theedge of the glass and beyond the plane oi the adjacent face thereof soas to keep the clamping bar in position.

In one convenient arrangement .the limb of the clamping bar nearer tothe glass is concavely curved or otherwise so shaped asto present, forengagement by the edge of the glass, a surface sloping in such adirection as to tend to urge the angle of the clamping bar towards theglass irrespective of the exact position of the edge of the glass.

The invention may be carried into practice in various ways of glazingbar according to the invention are illustrated by way of example in theaccompanying drawing, in which Figure 1 is a sectional perspective viewof one construction of glazing bar according to this in vention,

Figure 2 is a cross-section of an alternative construction of glazingbar according to the invention, and

Figure 3 is a cross-section of a further alternative construction, alsoaccording to the invention.

In the construction illustrated in Figure 1, the glazing bar comprises amain girder-like member) for example of an aluminium alloy, from one 50edge of the web A of which extend laterally two main projections Bhaving rib-like parts B each constituting a main abutment and adapted tobear on one face of a sheet of glass C, C The edge of the web A remotefrom the projections B 56 is formed with a rib or bead A the undersideof but three alternative constructionseach edge of which constitutes asubsidiary abutment forming a seating for the inner edge of a clampingbar D of generally L-shaped crosssection, as shown, and formed from aresilient materiaL-ior example a suitable aluminium alloy. The outeredge of each clamping bar D is bent inwards towards the web as shown atD, the parts D being somewhat curved as indicated and so arranged thatwhen, after placing the inner edge of each clamping bar in engagementwith itsabutment A the outer edge is pressed inwards towards the web,the part D of the clamping bar joining the arms of the L will be broughtinto engagement with the adjacent face of the glass C, C while the freeedge D of this part will extend beyond the edge of the glass and throughthe plane of the adjacent face of the glass so as to cause the part D ofthe bar to be pressed firmly intoand maintained in engagement with theadjacent face of the glass.

Extending from each of the projections B is a protective flange B whichextends outwards beyond the point where the part B engages the glass butnot into contact with the glass.

In the alternative construction illustrated in Figure 2 ,the glazing barcomprises a girder-like member having a web A one edge of which isformed with parts B, B B constructed similarly to the correspondingparts in the construction shown in Figure 1. Instead of the subsidiaryabutments for the inner edges of the clamping bars D being constitutedby the under edges of a rib extending along the edge of the web remotefrom the members B, however, the subsidiary abutments forming seatingsfor the inner edges of the clamping bars D, D D, D in the constructionshown in Figure 2 are constituted by a separate ribs A as shown and theweb extends outwards beyond these ribs and is provided with a bead Aalong its edge. In this way, the strength of the web is increased abovethat oi the web shown in Figure 1 while retaining the dimensions of theclamping bars D the same. Thus clamping bars of the same size can beused with glazing bars according to the invention constructed either asshown in Figure 1 or as shown in Figure 2.

When assembling a glazing bar according to the invention as shown inFigure 1 or in Figure 2, one face of each sheet of glass is firstbrought into engagement with the. appropriate member B the inner edge ofeach clamping bar D is then placed in engagement with its abutment A orA? as shown at the right-hand side. of Figure 2, and

,the outer edge of the clamping bar is then pressed inwards towards theweb until the clamping bar occupies the position shown in Figure 1 andat the left-hand side of Figure 2.

In some cases the parts B may be provided with caps of packing material,for example of a flexible nature extending over their free edges so asto form a packing between the projections and the glass while, ifdesired, the edges of the main abutments or of the locking bars or bothwhere they engage the glass may be provided with shallow channels toreceive textile or other flexible packing material to assist inmaintaining the joint between them and the glass. Further, in somecases, additional projections may be provided on the web to space theedge of the glass positively a predetermined distance from the web,these projections being such as not to interfere with the passing of thefree edges D of the clamping bars beyond the edge of the glass andthrough the plane of the adjacent face of the glass.

In the alternative construction illustrated in Figure 3, the glazing baris generally similar to that shown in Figure 1 but the web E terminatesin a rib or bead E which is furnished on its underside with curvedgrooves E instead of the substantially rectangular channels shown in theother figures. Each of these curved grooves constitutes a subsidiaryabutment to form a seating for the curved inner edge F of a clamping barF of generally L-shaped cross-section as already described. By curvingthe upper ends of the resilient bars a better bearing is provided forthese members and the fixing of the glass in position is facilitated.

At its lower end the glazing bar illustrated in Figure 3 is providedwith main lateral projections G each having a rib-like part G toconstitute a main abutment adapted to bear on the underface of the glasssheet as already described and also provided with a protective flange (3similar to the flanges B shown in the other figures.

In addition to the members G G, arms G are provided which are preferablyslightly resilient and have their outer ends beaded, as shown, to engagethe underside of the glass sheet and ensure a dust-tight flt therewith.

It will be appreciated that the glazing bar above described may beprovided with a bead similar to that shown at A in Figure 2 and that inall cases the clamping bars may have curved inner ends, as shown inFigure 3, whether the additional flexible arms such as G are employed oromitted.

It is to be understood that, although the invention has been describedwith particular reference to glazing bars in which the main part of thebar and the clamping bars are formed of suitable aluminium alloys. theparts may -be formed of other metals or substances having the necessaryrigidity and resilience for the purposes required. Further, the form ofthe main abutment or abutments engaging one face of the glass, and theprotective flange or flanges, where provided, and the form of. thelocking bars and the subsidiary abutments forming seatings for theirinner edges, as well as other details of construction, may be modifiedwithout departing from this invention.

The parts of glazing bars according tothe invention may, whereconvenient, be produced by an extrusion process.

What I claim as my invention and desire to secure by Letters Patentis:--

1. A glazing bar comprising a Web having spaced main and subsidiaryabutments which extend longitudinally and are formed integral with itand'between which the edge of a sheet of glass is adapted to lie so asto rest on the main abutment, and a clamping bar disposed between theglass and the subsidiary abutment, this clamping bar having sufficientresilience to permit limited flexing thereof during insertion and havingtwo portions one of which slopes away from the web to the surface of theglass while the other or glass-engaging part extends'inwards towards theweb and is gradually curved so that its inner edge where it engages theedge of the adjacent face of the glass is inclined to the face of theglass and projects beyond the edge of the glass and through the plane ofthe adjacent face thereof so that by its reaction against the edge ofthe glass, it tends always to move towards the web and thus acts as atension member which tends to draw the junction between the two parts ofthe bar towards the web and thereby maintain it in contact with theglass irrespecive of the exact position of the edge of the glass.

2. A glazing bar comprising a web having spaced main and subsidiaryabutments .which extend longitudinally and are formed integrally with itand between which the edge of a sheet of glass lies so as to rest on themain abutment,

said subsidiary abutments being longitudinally recessed, and a clampingbar disposed between the glass and the recess of a subsidiary abutment,

and being of generally L-shaped cross-section, this clamping bar beingof such resilience as to permit limited flexing thereof during insertionand being arranged with one limb sloping from the subsidiary abutmentaway from the web to the surface of. the glass while the other orglassengaging limb extends inwards towards the web and is so shaped thatits inner edge where it engages the edge of the adjacent face of theglass is inclined to this face and projects beyond the edge of the glassand through the plane of the adjacent face thereof so that by itsreaction against the edge of the face of the glass it tends always tomove towards the web and thereby to draw the part of the clamping baradjacent to the junction of the limbs towards the web and cause thispart to bear on the glass with a force which is maintained by and is afunction of the tension in the glass-engaging limb.

3. A glazing bar comprising a web having spaced main and subsidiaryabutments which extend longitudinally and are formed integrally with itand between which the edge of a sheet of glass lies so as to rest on themain abutment, and a clamping bar disposed between the glass and thesubsidiary abutment and of generally L- shaped cross-section, thisclamping bar being of such resilience as to permit limited flexingthere- 4 of during insertion and being arranged with one limb slopingfrom'the subsidiary abutment away from the web to the surface of theglass while the other or glass-engaging limb extends inwards towards theweb and is bent or curved so that its inner edge where it engages theedge of the adjacent face of. the glass is inclined to this face andprojects beyond the edge of the glass and through the plane of theadjacent face thereof so that by its reaction against the edge of thisface it tends always to move towards the web and thus act as a tensionmember which tends to draw the part of the clamping bar adjacent to thejunction of the limbs towards the web and thereby maintains this part ofthe bar in contact with the glass irrespective of the exact position ofthe edge of the glass.

4. A glazing bar comprising a web having spaced main and subsidiaryabutments which extend longitudinally and are formed integrally with itand between which the edge of a sheet of glass lies so as to rest on themain abutment, and a clamping bar disposed between the glass and thesubsidiary abutment and of generally L-shaped cross-section, thisclamping bar being of such resilience as to permit limited flexingthereof during insertion and being arranged with one limb sloping fromthe subsidiary abutment away from the web to the surface of the glasswhile the other or glass-engaging limb extends inwards towards the Weband is gradually curved so that its inner edge projects beyond the edgeof the glass and through the plane of the adjacent face thereof wherebythe part of the clamping bar adjacent to the junction of the limbs iscaused to bear on the glass with a force which is maintained by and is afunction of the tension in the glass-engaging limb, the surface of thesubsidiary abutment engaged by one edge portion of the clamping barbeing curved so as to be part-cylindrical and the said edge portion ofthe clamping bar being correspondingly curved to engage therewith insuch manner that the clamping bar extends from the part of the curvedsurface of the abutment remote from the web.

5. A glazing bar comprising a web having spaced main and subsidiaryabutments which extend longitudinally and are formed integrally with itand between which the edge of a sheet of glass lies so as to rest on themain abutment, and a clamping bar disposed between the glass and thesubsidiary abutment and of generally L-shaped cross-section, thisclamping bar being of such resilience as to permit limited flexingthereof during insertion and being arranged with one limb sloping fromthe subsidiary abutment away from the web to the surface of the glasswhile the other or glass-engaging limb extends inwards towards the weband is bent or curved so that its inner edge is inclined to the face ofthe glass and projects beyond the edge of the glass and throughthe-plane of the adjacent face thereof thus acting as a tension memberwhich tends to draw the part of the clamping bar adjacent to thejunction of the limbs towards the web and thereby maintains this part ofthe bar in contact with the glass irrespective of the exact position ofthe edge of the glass, the surface of the subsidiary abutment engaged byone edge portion of the clamping bar being curved so as to bepart-cylindrical and the said edge portion of the clamping bar beingcorrespondingly curved to engage therewith in such manner that theclamping bar extends from the part of the curved surface of the abutmentremote from the web.

JACK WILLIAMS.

